Trying to recursively lock an os_unfair_lock

[KyleWLawrence]

I believe this is a compass problem, but could be a more general Ruby problem. When I run "compass watch" and I change a SASS or SCSS file, it is supposed to create a CSS file. However, instead it generates an error in the console and there is a more detailed error report in ~/Library/Logs/DiagnosticReports.

You can see there full error report here.

In summary from the error report:,
Application Specific Information: abort() called BUG IN CLIENT OF LIBPLATFORM: Trying to recursively lock an os_unfair_lock

And from the console:

-- Machine register context ------------------------------------------------
 rax: 0x0000000000000f0f rbx: 0x0000000000000003 rcx: 0x00007fff9736cb21
 rdx: 0x0000000000010000 rdi: 0x0000000000000f0f rsi: 0x0000000000000f0f
 rbp: 0x00007ffade017780 rsp: 0x00007ffade017748  r8: 0x0000000000000028
  r9: 0x000000000000000b r10: 0x0000000000000004 r11: 0x0000000000000000
 r12: 0x00000001081a6e00 r13: 0x0000000000000f0f r14: 0x0000000001010002
 r15: 0x0000000000000f0f rip: 0x00007fff9736ab44 rfl: 0x0000000000010203

-- C level backtrace information -------------------------------------------
^C[BUG] pthread_mutex_lock: Invalid argument (EINVAL)
ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14]

-- Control frame information -----------------------------------------------

-- C level backtrace information -------------------------------------------
0   ruby                                0x00000001080bd6e5 rb_vm_bugreport + 149
1   ruby                                0x0000000107f60704 rb_bug + 468
2   ruby                                0x0000000107f60a1a rb_bug_errno + 122
3   ruby                                0x00000001080cbc95 thread_timer + 613
4   libsystem_pthread.dylib             0x00007fff97371aab _pthread_body + 180
5   libsystem_pthread.dylib             0x00007fff973719f7 _pthread_body + 0

-- Other runtime information -----------------------------------------------

SEGV received in ILL handler
[1]    74577 abort      compass watch

Any advice on where to look? My config.rb is pretty unique if that will help trouble-shoot it.